* {
    margin: 0;
    padding: 0;
}
body {
    font-size: 16px;
    background-color: gray;
}
a {
    text-decoration: none;
    color: white;
    font-size: 12px;
}
.box {
    width: 300px;
    margin: 100px auto;
}

h3 {
    color: white;
    margin-bottom: 10px;
    text-align: center;
}
.box1 input,
.check {
    display: block;
    width: 100%;
    height: 2rem;
    margin-bottom: 1rem;
    background-color: white;
    color: grey;
    border: 1px solid grey;
    line-height: 1.5rem;
    border-radius: 1rem;
}
.check {
    text-align: center;
    font-size: 1rem;
}
.box2 span {
   margin-right: 150px; 
}
.for {
    font-size: 14px;
}
.box2,
.box3,
.box4 {
    margin-bottom: 1rem;
}

.on {
    background-color: gray;
    width: 100px;
    height: 2rem;
    color: white;
    border:1px solid white;
    border-radius: 2rem;
    line-height: 1rem;
}

